The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2011
Filed:
Oct. 21, 2008
Sriram Rajamani, Karnataka, IN;
Ganesan Ramalingam, Karnataka, IN;
Venkatesh-prasad Ranganath, Karnataka, IN;
Kapil Vaswani, Karnataka, IN;
Sriram Rajamani, Karnataka, IN;
Ganesan Ramalingam, Karnataka, IN;
Venkatesh-Prasad Ranganath, Karnataka, IN;
Kapil Vaswani, Karnataka, IN;
Microsoft Corporation, Redmond, WA (US);
Abstract
Locks are used to protect variables. All variables protected by a lock are allocated on a page associated with a lock. When a thread (called the owner) acquires the lock, a local copy of the memory page containing the variable is created, the original memory page is protected, and all access of the variable in the owner thread is directed to the local copy. Upon releasing the lock, the changes from the local copy are carried over to the memory page and the memory page is unprotected. Any concurrent access of the variable by non-owner threads triggers an exception handler (due to the protection mechanism) and delays such an access until after the owner thread has finished accessing the variable.